Fourier MultiLab, User Manual

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Chapter 2 MultiLab Software 81
1. Scaling
In order to scale your project you must tell MultiLab the real world dimensions. When
you film a new movie make sure to measure the dimension of a dominant object in
the frame. Try to find an object that's dimensions are in the magnitude of the whole
scene.
Scaling is done in two steps
– you need to mark the object in the video frame and to
type in the real dimensions:
1. Click scale on the Video Motion Analyzer toolbar to open the
Scale dialog:
2. Click one end of the scaling object.
3. Click the body’s other end.
MultiLab will display two markers on the points you clicked.
4. You can drag the markers to change their position.
5. Type in the body’s actual dimension in the Actual dimension edit
box (in cm).
6. Click OK.
You can change the scaling anytime by clicking Scale and repeating the
procedure.
2. Set Coordinate System
To set the coordinate system you must specify the origin position and the x axis
direction. You can do it either by a click of the mouse or by entering it manually to the
coordinate system dialog.
Unless you specify otherwise MultiLab will use its default: the origin is in the lower left
side of the frame and the axes are parallel to the window
’ s sides.
Set origin
1. Click Set origin on the Video Motion Analyzer toolbar to open
the Coordinate system dialog: